@misc{indiciae72f4de7b5f15,
  title = {Remediation of acid mine drainage at the friendship hill national historic site with a pulsed limestone bed process},
  author = {P.L. Sibrell and B. Watten and T. Boone},
  year = {2003},
  url = {https://pubs.usgs.gov/publication/70025163},
  note = {Source identifier: 70025163}
}